Para-phenylenediamine Schiff base: highly fluorescent photostable solid-state organic dye  

作　　者：HANI BARHUM MOHAMMAD ATTRASH INGA BRICE VYACHESLAV V.KIM CORMAC MCDONNELL MARIAM AMER MADHAT MATAR JANIS ALNIS TOMS SALGALS IBRAHIM YEHIA VJACESLAVS BOBROVS RASHID A.GANEEV PAVEL GINZBURG 

机构地区：[1]Triangle Regional Research and Development Center,Kfar Qara’3007500,Israel [2]Department of Physical Electronics,Tel Aviv University,Tel Aviv 69978,Israel [3]Institute of Atomic Physics and Spectroscopy,University of Latvia,Riga 1004,Latvia [4]Laboratory of Nonlinear Optics,Institute of Astronomy,University of Latvia,Riga [5]1004,Latvia 5 Institute of Fundamental and Applied Research,TIIAME National Research University,Tashkent 100000,Uzbekistan [6]Institute of Telecommunications,Riga Technical University,Riga 1048,Latvia [7]Department of Sciences,Western Caspian University,Baku AZ1001,Azerbaijan [8]Department of Optics and Spectroscopy,Voronezh State University,Voronezh 394018,Russia

出　　处：《Photonics Research》2024年第11期2639-2650,共12页光子学研究(英文版)

基　　金：State Task for Universities (FZGU-2023-0007);Naomi Foundation through the Tel Aviv University GRTF Program,ERC St GaIn Motion”(802279);Tel Aviv University Breakthrough Innovative Research Grant,the Ministry of Science,Technology and Space of Israel(0006764);European Research Council PoC (101066138);European Regional Development Fund (1.1.1.5/19/A/003);Latvian Council of Science project (lzp-2022/1-0553)。

摘　　要：Schiff bases derived from the condensation of primary amines with aldehydes,such as para-phenylenediamine with salicylaldehyde,exhibit unique optical and structural properties ideal for photonic applications.This study synthesizes such a Schiff base,revealing its properties through detailed 1HNMR,FTIR,and XRD characterizations.The compound forms a robustπ-conjugated structure,showing a fluorescence emission peak at 560 nm and significant absorbance at 380 nm.A spin-coated laser cavity displayed a critical lasing threshold at 1 MW·cm^(-2),which could be optimized down to 0.6 kW·cm^(-2).Moreover,the compounds’acceptor-donor-acceptor configuration raised outstanding nonlinear optical properties,including a substantial two-photon absorption cross-section of 2×10^(-11) cm·W^(-1)·GM,enhancing its utility in high-resolution two-photon imaging and advanced photonic applications.Other nonlinear optical characteristics determined during these studies are the saturable absorptioninduced nonlinear absorption coefficient(-2×10^(-11) cm·W^(-1)),saturation intensity(2.5×10^(11) W·cm^(-2)),and Kerr-induced nonlinear refractive index(5×10^(-16) cm^(2)·W^(-1)).The combined linear and nonlinear optical properties,supported by sustained emission and minimal photobleaching under intense re-excitation,establish the paraphenylenediamine Schiff base and derivatives as promising materials for high-brightness,photostable organic light emitters,and solid-state lasers.

关 键 词：SCHIFF BASE ABSORPTION 

分 类 号：O62[理学—有机化学]